2178000001 has 8 divisors (see below), whose sum is σ = 2298989600. Its totient is φ = 2063361924.

The previous prime is 2177999983. The next prime is 2178000007. The reversal of 2178000001 is 1000008712.

It is not a de Polignac number, because 2178000001 - 2²⁹ = 1641129089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2178000007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151911 + ... + 165628.

It is an arithmetic number, because the mean of its divisors is an integer number (287373700).

Almost surely, 2^2178000001 is an apocalyptic number.

It is an amenable number.

2178000001 is a deficient number, since it is larger than the sum of its proper divisors (120989599).

2178000001 is an frugal number, since it uses more digits than its factorization.

2178000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317596 (or 317558 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 2178000001 is about 46669.0475690259. The cubic root of 2178000001 is about 1296.2416103883.

Adding to 2178000001 its reverse (1000008712), we get a palindrome (3178008713).

The spelling of 2178000001 in words is "two billion, one hundred seventy-eight million, one", and thus it is an aban number.